He targeted five properties in the W8 area between Saturday, March 3 and Saturday, April 21, and has broken in while families – including children – were in their homes.

On one occasion, he ransacked a bedroom while children were having a bath in the room next door.

The burglar has ransacked homes while children were inside (Picture: Met Police)

In three of the burglaries, he has entered the properties by climbing up to access windows up to four-storeys high.

He has been caught on CCTV on four occasions and police say they are hopeful someone may recognise him before he strikes again. The burglaries are being investigated by Kensington and Chelsea police under Operation Redwulf.

1. Saturday, March 3 at 18:30hrs on Argyle Road, W8

The suspect climbed to the top floor of a four-storey house and broke in through a window while the family were downstairs having dinner.

This Rolex watch was stolen in the first burglary (Picture: Met Police)

He made an untidy search of a bedroom while children were in the bath in the next room. The suspect stole a £30,000 rose gold Rolex watch and cash and bank cards.

2. Thursday, April 12 at 21:20hrs on Cottesmore Gardens, W8

The burglar got in through a bedroom window minutes after the family had gone out. He activated the house alarm but managed to make off with jewellery worth £20,000, including a 1950s vintage men’s Rolex watch and foreign currency.

3. Saturday, April 14 at 20:10hrs at a flat in Palace Gardens Terrace, W8

The female victim was out and came home to find the burglar had got inside through a high fourth floor window and stolen cash and jewellery worth around £35,000.

The items stolen included sentimental pieces that belonged to her late mother; a solitaire emerald-cut diamond engagement ring with a stone around two carats and on a platinum band and a vintage ladies’ Omega watch with no numerals on it.

The victim said: “This burglary has made me feel very sad. The fact that someone came into my house uninvited and rifled through my possessions is distressing.

“The items which were stolen were of huge sentimental value as they belonged to my late mother. She wore the ring and watch every day and they have been in our family for more than 70 years.”

4. Monday, April 16 at 22:40hrs on Victoria Road, W8

While the victim, her husband and children were at home, the suspect broke in through an upstairs window to steal around £185,000 of designer bags, including Hermes, Louis Vuitton and Kelly.

The suspect has been caught on CCTV four times (Picture: Met Police)

The victim said: “I was at home with my husband and children when this man broke in. It is truly horrible to think someone was rummaging through our property as my husband and I were downstairs unaware of what was going on and my children were sleeping nearby.

“It has made us all feel really nervous about being in our home, a place where we should feel safe.

“I would ask anyone with information about this man to please come forward and speak to the police as soon as possible.”

5. Saturday, April 21 at 21:05hrs on Brunswick Gardens W8

The homeowner was abroad but via the property’s security cameras saw the burglar jumping over a rear garden fence and getting into the house through open patio doors.

He rummaged through a dressing room with the homeowner’s children and nanny on the floor above but may have been disturbed as he left without stealing anything.

Detective Constable Eve Kelly, from the proactive unit at Notting Hill, said: “The man behind this spate of burglaries is organised and diligent and has targeted wealthy properties with great care.

“Waiting until it is dark, he climbs into gardens looking for opportunities to scale walls and climb roofs and drainpipes. Once inside, armed with a torch and a rucksack, he takes his time looking through cupboards and drawers.

“He is not afraid to break in when families are at home, although I must stress he takes care not to be seen and has not physically harmed anyone.

“On one occasion he ransacked a property while the family including two young children were in the house and another time he was seen on camera creeping around while children and a nanny were in the house hiding in the bathroom having been alerted to his presence.

The burglar has struck five times in west London (Picture: Met Police)

“The homeowner was abroad but checked in on his children via cameras in the house and was understandably horrified by what he saw. The suspect would have been aware that children were in the house due to the noise they were making.

“The value of the property stolen amounts to hundreds of thousands of pounds and includes items of highly sentimental value which are irreplaceable.

“This type of crime has a huge impact on not only the victims and their families, who no longer feel safe in their own homes, but upon the local community who are worried he will strike again. This man must be arrested.

“We would appeal for anyone with information to come forward – this man certainly isn’t scared of heights and is fit and agile. Could he be a scaffolder or a builder, someone used to working at height?

“Likewise we would ask anyone who has been offered these distinctive items for sale to contact us immediately.”